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- Title
CONDUTIVIDADE HIDRÁULICA EM FUNÇÃO DO CRESCIMENTO DE Urochloa decumbens.
- Authors
Takashi Hara, Anderson; da Silva Domingues, João Vitor; Andrade Gonçalves, Antônio Carlos; Silva Santos, Fernando André; Takao Hashiguti, Heraldo; Rezende, Roberto
- Abstract
The cultivation of Urochloa decumbens has been used in no-tillage system, with the objective of providing improvements in soil physical properties, causing good conditions for establishment of the subsequent crop. Among the improvements, the possibility of modifying the variable saturated hydraulic conductivity of the soil is highlighted, allowing higher rates of infiltration, which may be favorable to plant development. This work aimed to evaluate, in a clay soil, the effect promoted by a cycle of this crop on soil physical characteristics, in a scale compatible with the distances in which the interaction plant and soil are established. It was verified that the average saturated hydraulic conductivity of the soil layer explored by the root system became three times higher at the end of the crop cycle. It was identified a quadratic relation between hydraulic conductivity and leaf area index of the crop, with a maximum point in the intermediate portion of the cycle, suggesting that the massive root system, in the final portion of the cycle, promotes a significant reduction of macroporosity. which dissolves after desiccation of the culture. Spatial continuity was identified for the variables under study and it was verified that the presence of the culture modifies the spatial pattern of the same, and that this pattern persists in the time, after the removal of the culture.
- Publication
Revista Brasileira de Agricultura Irrigada - RBAI, 2019, Vol 13, Issue 3, p3454
- ISSN
1982-7679
- Publication type
Article
- DOI
10.7127/rbai.v13n301066